Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 6, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3079414
Keywords
amorphous semiconductors; elemental semiconductors; semiconductor thin films; silicon; solar cells; thin film devices
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Funding
- Swiss Federal Energy Office (OFEN) [101191]
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The micromorph solar cell (stack of amorphous and microcrystalline cells) concept is the key for achieving high efficiency stabilized thin film silicon solar cells. We introduce a device structure that allows a better control of the light in-coupling into the two subcell components. It is based on an asymmetric intermediate reflector, which increases the effective thickness of the a-Si:H by a factor of more than three. Hence, the a-Si:H thickness reduction diminishes the light induced degradation, and micromorph tandem cells with 11.2% initial and 9.8% stabilized efficiencies (1000 h, 50 degrees C, and 100 mW/cm(2)) are made on plastic substrates with T(g)< 180 degrees C.
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